Chill for chilling metal



"Uixu'rnD STATES] PATENT ,OFFrcn.

wILLInM Tomte, or DowAGIAo, MienIeAN.

cHluL Fon CHILLING METAL.

SPECIFICATION forming part of Letters Patent No. 272,497, dated February20, 1883.

' nppnanon sied october 16, rss2. (No model.)

To alt whom it may concern: O

Be it known that 1,-W1LLIAM TUTTLE, of

Dowagiac, county of Cass, and StateofMichigan, have invented a certainImprovement in Chills for Chilling 'Metals, ot' which the fol. vlowingis a specification.

My invention relates to that class ot' chills designed for chilling andforming holes through castings in the process of casting in molds.

The object of my present invention is to overcome the warping of themetal plates constituting the main portion of the chill, and also toprovide the same with longitudinal recesses for retainingthe sandtilling, all of which will be hereinafter described.

In order to aid others skilled in the art to which my invention relatesto make and use the same, I will describe its features with ret'-erence. to the drawings forming a part ofthis specification, in which-Figure lis an end view of the chill as it appears within the wheel-hub Awhen removed from the mold. Fig. 2 is an enlarged view of one of thethimbles D. Fig..3 is a cross-sectional view ot' the chill and parts,having the thimble removed to show tapering ends j'. Fig. 4 is an insideview of one of the metal plates B, showing longitudinal recesses C C.Fig.5 is an elevated plan view of the chill, having one of the thimblesD removed.

The chill consists of two metal plates, B B, of equal' form andproportion, being tlat ont-heir joining faces and convexed on their exi'terior. Each end or" the plates is shouldered at c with sloping endsf.The thimblesD are secured over the tapering ends, as shown in Figs. land 5. Between the joining faces ot the plates B B is a strip of wood,F. Any perishable material may be used,'wood being preferable, as it ischeap. The strip F is narrower than the metall plates, leaving channelson each edge, as shown in Fig. 3. I providethe platesB B with recesses GC, extendingfrom shoulder a to shoulder a', as shown-in Fig. 4. When theplates are in position, asin Fig. 3, the channels form an opening havingconcave sides. The channels are lled with common core-sand. Placing thethimbles D in position, and lling the channels with sand, the chills arebaked to harden the sand iilling and to expel moisture. The convexity ofthe recesses prevents the sand filling from falling out of the channelswhile placing the chills in the molds for the purpose specified. Thestrip of wood, F, extends through the chill from shoulder to shoulder aa', leaving an'opening, G', between the tapering portionsf of theplatesB B. (See Fig. 3.) The thiinbles D areprovided with aV division orpartition, a,

passing through the diameter of the same, as

shown in Figs. 2 and 5. When the thimbles are placed over the taperingportions ot' the plates B B, as in Fig. 5, the partition @passes withinthe opening O', as shown in Fig.3. The thimbles, when forced over saidends, bind the metal'plates to the wood or perishable center F, thusholding it in place. The thickness ot' the partition a should be lessthan that ot the perishable center, to allow the partition a to enterthe opening C freely, and not to come iu contact with the metal plates BB, for the reason hereinafter described.

My present invention is designed as an improvement upon my Patent No.265,646,dated October l0, 1882. In my former invention the metal pl'ateswarp lengthwise in cooling, caused by the central portion burning away,form-in g a free passage for the air between the plates, coolingthe flatsides, while the convexedportio'us are kept hot by the castingencircling them. The cooling of the plates on their flat surfaces fasterthan on their convexed portions causes them to contract, drawing the endportions toward each other.v Thev plates cool in this position, and whenplaced together,

the dat surfaces joining', they meet at the ends and are apart atthe'center, thus warping longitudinally. My presentinvention overcomeskthis difliculty.Y The partition a of the thimbles said thiinbles to beremoved, when the parts B B may be drawn out of the casting.

Having described my invention in the most exactterins that I can give,what l claim as new, and desire to secure by Letters Patent, is'- IOO 1.In a metal-chill, the combination of the C C and a perishable center,the thimbles D D, metal plates, flat on their inner faces, having havingpartitions a a, and sand filling, when xo longitudinal recesses C G inthe same, said arranged and combined for the purposes speciplates beingoonvexed on their exterior, with lied.

5 the perishable center piece, as and for the pur- WILLIAM TUTTLE.

poses set forth. Witnesses 2. In nmetalehill, the combination of theRICHARD HEDDON, metal plates B B, havinglongitudinai recesses M. A.TUTTLE.

